In mid-July, it is in the period of cotton vegetative growth and reproductive growth. Doing a good job in cotton field management and implementing early topping is one of the most effective and direct ways to accelerate the transformation of cotton vegetative growth, promote early maturity, promote stable production, and compete for high yield. Technical measures to prevent conscious backwards, late closure, influence maturity and quality. Follow the principle of weak first, then high and then low, the natural height of the cotton plant at harvest is less than or equal to 80 cm, and the work should be done after the topping. Pour a leaf about 3 cm to adjust, divide it twice, 5-7 days, 4-5 grams each time, avoid playing sap.

According to the growth and development of cotton, the order of "Wang Miao early fight, weak seedling late fight, strong seedlings hit at the right time" is adopted, and the "when the branches are not equal, the time is not equal." After the topping of cotton, it will enter the period of growth, and flowers, buds and bells will gradually form. At this stage, it is necessary to constantly regulate the management of water and fertilizer, ensure the nutritional needs of cotton, and do a good job in prevention and control of pests and diseases.

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